JP2000131023A - Apparatus for measuring living fish in fish tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make automatically measurable the number of fishes, the body length and the weight thereof by providing a sensor for detecting a fish when it passes through an opening formed through a submerged part of a mover sunk in a fish preserve. SOLUTION: The mover 1 is movably disposed in a water tank 20 and composed of a peripheral edge, a frame 2 and a fish-blocking net 3 mounted on the frame 2. An opening 1a allowing only one fluke to pass through is bored through the water tank 20 near its bottom. The mover 1 vertically inserted down and sunk near one wall of the tank 20 is moved to the other wall. The fluke sensing the water flow from a nozzle 5 and the approaching mover 1 goes away from the bottom face and passes through the opening 1a to an adjacent chamber. The mover 1 is moved until no fluke exists between the other wall and the mover. A CCD 11 near the opening 1a detects the fluke passing through the opening 1a, its signal is sent to an image processor 13 which converts to the number of flukes and the body length thereof, and a printer 7 outputs them as measured values.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring live fish, and more particularly to automatic measurement of the number, body length, and weight of live fish kept in a fish tank.

[0002]

2. Description of the Related Art In the field of aquaculture, in which fry is released into a cage and the fry is regularly fed and raised, a large amount of bait is used because the number and size of fish in the cage are not accurately understood. Have given. For this reason, there is a problem in that the leftover food sinks and rots and contaminates the aquaculture farm, and the leftover food itself raises production costs as wasted food.
Therefore, the fish in the cage are scooped with a scoop net or the like, and the number and size of the fish are measured by eye measurement. Further, a live fish counting device invented by the present inventor is disclosed in Japanese Patent Application Laid-Open No. Hei 6-243331.

[0003]

However, in the conventional eye measurement work, not only the work is complicated but also the work of scooping fish with a scooping net is extremely difficult. Further, there is a problem that fish scooped by the scooping net is abraded and causes disease. In addition, in order to use the live fish counting apparatus of the present inventor, it is necessary to remodel the existing fish cage, and there is a problem that the remodeling cost is high.

[0004] The present invention has been made to solve the above-mentioned conventional problems, and can automatically measure the number, length, and weight of fish in a fish tank capable of breeding live fish such as a live cage.
It is an object of the present invention to provide a live fish measuring device in a fish tank that can be used without modification even in an existing fish cage.

[0005]

According to the present invention, there is provided an apparatus for measuring live fish in a fish tank which can be inserted into a fish tank in which fish are bred. A moving element in which fish bred in the tank is prevented from passing through and is allowed to advance and retreat in the fish tank, and an opening through which the fish can pass without being polymerized in a submerged portion, and passing through this opening And a measuring means having a sensor capable of detecting a fish to catch.
The frame member constituting the movable element is made of a telescoping structure or the like so as to be stretchable so that the outer shape of the movable element and the inner diameter of the opening can be adjusted to an arbitrary size and the position of the opening is fixed. It is preferable to be able to adjust within the range.

[0006]

According to the present invention, for example, when a fish passes through an opening penetrated through a submerged portion of a moving child submerged in a living cage, a sensor capable of detecting the fish detects the fish and controls the signal. When the controller sends the signal to the output device such as a printer, the controller converts the signal into the number and length or weight of fish and outputs the signal to an output device such as a printer. Acts as displayed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a live fish measuring apparatus in a fish tank according to the present invention will be described below with reference to the drawings, but the present invention is not limited thereto.

[0008]

Embodiment 1 FIGS. 1 and 2 show a first embodiment of a live fish measuring device in a fish tank according to the present invention, which is a measuring device for flatfish. The feature of this embodiment is that the fish passing through a plurality of openings 1a penetrating below the moving element 1 inserted substantially vertically into the water tank and allowing only one fish to pass through each one near the opening 1a In that the measurement can be performed by the measuring means disposed in the first position.

In FIG. 1, reference numeral 1 denotes a fish which is inserted substantially vertically into an aquarium 20 where flounders are bred, and a gap between an outer peripheral edge and an inner surface of the aquarium 20 is fish in the aquarium 20 as shown in FIG. Is a movable member which is arranged so as not to be able to pass through the water tank so as to be able to advance and retreat in the water tank. A plurality of openings 1a in the horizontal direction near the bottom surface of the aquarium 20 through which only one flounder in the aquarium can pass; (Three places in the figure).

A measuring means 10 is mounted near the opening 1a on the side of the moving element 1 on the side where the fish exits (the left side in the figure), and serves as a sensor for detecting fish passing through the opening 1a. CCD camera 11 detects a flatfish passing through a passage through which only a single flounder consisting of a backlight 12 and a guide member 4 made of a transparent material can pass, and sends the information to the image processing device 13. It is converted into the signal of "number" and "length" of fish. The measuring means 10 is a known one, and the CCD camera 11 is housed in a box made of a transparent material and having a watertight structure. Further, the image processing device 13 and the controller 6 are connected by electric wires, and the controller 6 is connected to a printer 7 as an output device.

Reference numeral 5 is attached to the bottom surface of the water tank 20 of the moving element 1 and connected to a pump (not shown) via a tube, and directs the water supplied from this pump in the water tank toward the bottom surface of the water tank. It is a nozzle that discharges.

The operation of the above arrangement will be described with reference to FIG. The method of driving the fish into the opening 1a utilizes the danger avoiding ability of the fish, and moves the moving child to narrow the swimming space of the fish. First, mover 1 and water tank 2
After moving the moving element 1 on one of the walls of the water tank 20 (the left wall of the water tank in the figure) and lowering the moving element 1 by appropriate means so that the fish does not enter the wall of the moving element 0, the moving element 1 is moved by appropriate means. When the moving member 1 is moved toward the other opposite wall (moving to the right in the figure), the water flow discharged from the nozzle 5 and the moving member 1 approaching feel a sense of danger, and the flounder separates from the bottom surface. At the same time, he feels a sense of danger that the swimming space is gradually narrowed, and moves to the adjacent room which is separated into compartments through the moving element 1 through the opening 1a as shown in FIG.

Subsequently, when the moving element 1 is moved between the moving element 1 and the right wall in the figure until no flatfish is left, all the flatfish in the water tank 20 is moved to the aforementioned adjacent room, and the number thereof is automatically set. Is measured.

At this time, CC as a sensor for detecting fish
The D camera 11 detects flatfish passing through the opening 1a, and the signal is sent to the image processing device 13. The image processing device 13 converts the signal into the "number" and "body length" of the flounder and sends it to the controller 6, and the controller 6 outputs the information to the printer 7, and the printer 7 The body length is output as a measured value. (For example, the number and length of fish are printed on paper and output)

The data of the number of fishes and the length of the fish input as described above are processed by the controller 6 and the printer 7
Information necessary for production control such as population standard deviation of fish body length, frequency distribution map, average body length, number of tails and comments on preferred feeding weight,
In addition to the output of comments recommending further classification as the variation in body length after classification increases, and information from a visual device (not shown) that is connected to the controller 6 and faces the water to observe the prey of fish food. If the feed timing, the number of feeds, the weight of the feed for each feed, etc. are also output, it can be used as a preferable production management tool.

The frame member 2 is made of a telescopic structure such as a telescopic structure so that the outer shape of the moving element 1 and the size of the inner diameter of the opening can be adjusted to an arbitrary size, and the position of the opening is also within a predetermined range. Preferably it is adjustable within.

[0017]

Embodiment 2 The feature of this embodiment is that, as can be seen from FIG. 3, the movable element 1 is placed substantially horizontally in a net cage 21 where most of the lower part is submerged in the sea and hamachi is bred. And is sunk to the bottom of the cage 21 in the same manner as in the first embodiment.
1 is disposed so that the fish in the fish cage 1 cannot pass through, and is arranged so as to float up and down inside the fish cage 21. The opening 1 through which the hamachi in the fish cage 21 can pass only one by one at the center.
a is penetrated. The same parts as those shown in FIG. 1 used in the description of the first embodiment are denoted by the same reference numerals,
Here, duplicate description is omitted.

Measuring means 10 is mounted near the opening 1a on the surface of the moving element 1 on the side where the fish exits (the lower surface in the figure), and serves as a sensor for detecting fish passing through the opening 1a. A plurality of CCD cameras 11 are arranged orthogonally to a passage through which a hammer constituted by a backlight 12 and a guide member 4 made of a transparent material can pass only one by one. Is sent to the image processing device 13 and converted into signals of the “number”, “body length”, and “weight” of the detected fish. The measuring means 10 is a known one, and the CCD camera 11 is housed in a box made of a transparent material and having a watertight structure. Further, the image processing device 13 and the controller 6 are connected by electric wires, and
The printer 6 is connected to a printer 7 as an output device.

The operation of the above configuration will be described with reference to FIGS. The operation of the present embodiment is the same as that of the first embodiment, and the method of driving the fish into the opening 1a utilizes the danger avoiding ability of the fish and moves the moving element to narrow the swimming space of the fish. . First, the moving element 1 is appropriately
Is settled so that the hamachi does not enter between the moving element 1 and the bottom of the living pens 21 at the bottom of the living pens 21, and then the moving element 1 is raised toward the water surface by appropriate means. The hamachi feeling a sense of danger that the swimming space is gradually narrowed by the rising moving element 1 passes through the opening 1a and moves through the moving element 1 to the adjacent room on the seabed side, which is divided into compartments.

At this time, CC as a sensor for detecting fish
The D camera 11 detects the hamachi passing through the opening 1 a and the signal is sent to the image processing device 13. The image processing device 13 converts the signal into “number”, “body length” and “weight” of the hamachi and sends it to the controller 6 to send the signal to the controller 6.
When the printer 6 outputs the information to the printer 7, the printer
7 outputs the number, body length and weight as measured values.

Subsequently, when the moving element 1 is lifted until there is no hamachi between the moving element 1 and the sea surface, all the hamachi in the living cage 21 moves to the above-mentioned room on the sea floor side, and the number is automatically measured. Is done.

In the above embodiment, the number of the openings 1a is one, but the invention is not limited to this. That is, a plurality of openings may be provided. In this case, two CCD cameras orthogonal to the respective openings may be arranged and measured, and information from each camera may be collected in the controller 6. This has the effect of improving measurement efficiency.

[0023]

[Embodiment 3] The feature of this embodiment is that a measuring means using an ultrasonic sensor as a fish detection sensor is attached near an opening formed in a movable element which is inserted substantially vertically into a fish cage. The point is that the number and length of fish passing through the opening can be measured. By doing so, the backlight can be omitted and the measurement can be performed even at night.

In FIG. 5, a moving element 1 similar to that of the second embodiment is used.
The cage 2 is inserted substantially vertically into a substantially central portion of the cage 21 to form a gap between the edge of the moving element 1 and the inner surface of the cage 21.
It is arranged so that the fish in 1 cannot pass through. In addition,
Fish having phototacticity (habitability to gather light) such as horse mackerel, mackerel, sardine, yellowtail, etc. are bred in the living cage. 9 is a light shielding sheet. The measuring means 3 is located near the opening 1a on the surface of the moving element 1 on the side where the fish exits (the right side in the figure).
0 is attached, and an ultrasonic sensor 31 serving as a sensor for detecting a fish passing through the opening 1a is provided with a guide member 41 having a U-shaped cross section having an open upper portion.
When fish that pass through the passage that can only pass through the tails are detected one by one, and the information is sent to the image processing device 32, they are converted into signals of the “number” and “body length” of the detected fishes. The measuring means 30 is a known one. Also, as in the previous embodiment,
The image processing device 32 and the controller 6 are connected by electric wires, and the controller 6 is connected to a printer as an output device.
7 is connected.

The operation of the above configuration will be described with reference to FIG. The method of driving the fish into the opening 1a according to the present embodiment utilizes the phototaxis of the fish. First, when the moving element is inserted substantially vertically into the substantially central portion of the cage, the fish in the living cage are bisected into the left and right rooms with the moving element as a boundary wall. Then
When the room in which the measuring means is faced (the room on the right side of the figure) is covered with the light shielding sheet 9, the room is irradiated with sunlight and moves to the bright left room through the opening 1a. After confirming that all the fish have moved to the left room, the light-shielding sheet 9 is put on the left room where the fish are gathered. Move to the room. On this occasion,
A sound wave emitted from an ultrasonic sensor 31 serving as a sensor for detecting a fish hits a fish passing through the opening 1a, captures a sound wave reflected from the fish, and sends a signal to the image processing device 32. The image processing device 32 converts the signal into the number and length of fish and sends the signal to the controller 6.
, The number and length of fish are output to the printer 7 in the same manner as described above.

[0025]

Fourth Embodiment As shown in FIG. 6, a fish passing through an opening through which only fish in a cage can pass one by one can be measured by measuring means 10 disposed near the opening. The handle 15 may be extended from the child 1, and the moving element 1 may be moved with the handle 15. In this case, a member 17 that can move back and forth along the wall of the cage 21 is used.
This member 17 and the moving element 1 are connected by a flexible net material 16 between the and the inner wall of the fish cage 21 so that the fish in the fish cage cannot pass through, so that each can move in and out of the fish cage. Is also good.

[0026]

As described above, according to the live fish measuring device in the fish tank according to the present invention, the fish penetrating through the submerged portion of the movable element which is removably inserted into the fish tank where the fish are bred is provided. When a fish passes through an opening that can only pass one by one or one row at a time, the number, body length, or weight of the fish is automatically measured by the measuring means disposed near the opening, so that the quantitative measurement according to the growth of the fish Not only can production control be performed, but also humans are freed from complicated measurement work. In addition, since it is not necessary to scoop the fish with a net or the like, the fish can be freed from heavy work. Furthermore, the present invention has practically excellent effects such as not scratching the fish.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a first embodiment of a live fish measuring apparatus in a fish tank according to the present invention.

FIG. 2 is a view as viewed in the direction of the arrow A in FIG.

FIG. 3 is a cross-sectional view of a main part of a second embodiment of the live fish measuring device in a fish tank according to the present invention.

FIG. 4 is a view taken in the direction of arrow A in FIG. 2;

FIG. 5 is a sectional view of a main part showing a third embodiment of the live fish measuring apparatus in a fish tank of the present invention.

FIG. 6 is a plan view showing a fourth embodiment of the live fish measuring device in the fish tank of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Moving element 1a Opening part 2 Frame material 3 Netting material 4, 41 Guide member 5 Nozzle 6 Controller 7 Printer 9 Light-shielding sheet 10 Measuring means 11 CCD camera 12 Backlight 13 Image processing device 20 Aquarium 21 Measuring cage 30 Measurement Means 31 Ultrasonic sensor 32 Image processing device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06M 7/00 301 G06M 7/04 7/04 G06F 15/62 380

Claims (1)

[Claims] 1. A fish tank which can be inserted into a fish tank in which fish are bred and which does not allow a fish bred in the fish tank to pass through a gap between an outer peripheral edge and an inner surface of the fish tank. A movable element having an opening through which the fish can pass through without being superimposed in the submerged portion, and measuring means having a sensor capable of detecting a fish passing through the opening. Characteristic live fish measuring device in fish tank